C++ :: Iterating Through Struct Members?

Suppose I have a struct with 20 members. I want to assign each of those structs with values. Instead of accesing by explicit convention, i.e.:

Code: struct.member1 = 1;
struct.member2 = 2;
...
...
...
struct.member20 = 6;

Is there any way to encapsulate it in a for loop and use an iterator variable to indicate the member? i.e.:

Code: for (int i = 0; i < 20; i++)
struct.i = i;

The above is pseudocode but Im sure you get what Im trying to do?